Electrical conduit system



E. H. CURTIS.

ELECTRICAL CONDUIT SYSTEM.

APPLICATION FILED JULY 6, I918.

LQQS BOQ Patented Jmy 18, 1922.

3 SHEETS-SHEET I.

MCI Houwta E. H. CURTIS.

ELECTRICAL CONDUIT SYSTEM.

APPLICATION FILED JULY 6, 1918.

1 29309, Patented July 18, 1922.

3 SHEETS-SHEET Z.

E. H. CURTIS. ELECTRICAL CONDUIT SYSTEM.

APPLICATION FILED JULY 6,1918.

Patented July 18, 1922.

3 SHEETS-SHEET 3.

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Specification of Letters Patent.

Fatented July 18, 1922,,

Application. filed July 6, 1918. Serial No. 248,514.

Toallwhom it may concern.

Be it known that I, Eennar H. Gimme, a citizen of the United States, residing at Spring Valley, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Electrical Conduit Systems, of which the -following is a specification. 7

My present invention pertains to electrical conduit systems such as are designed to be installed in buildings in the course of.

construction so that wires drawn in the conduits and subject to removal or replacement subsequently to the completion of the structures may be protected and concealed while the "building is in progress. In order that this manipulation and disposition of the wires may be conveniently efi'ected it is esmarily for installation in floor structures of' buildings in course of construction, and con structed and equipped in such manner as to assure accuracy and stabillty of their positions in the finished building as well as to assure the flow of liquid concrete around them on all sides.

Another object is to provide outlet devices adapted to be embedded in reenforced concrete floor structures or other floor structures and to be placed and rigidly secured in position against both lateral and vertical displacement before the concreteis poured and so that the concrete can flow or pass entirely around them.

Another object of the invention is to rovide a levelling appurtenance designe to assure true initial positioning of the outlet devices as well as to enable an inspector to conveniently determine whether or not the devices are correctly positioned, with reference to being level, immediately prior to the pouring of the concrete.

Another object is to provide a levelling device-i. e., a device for determining the the concrete.

correctness of position of the outlet devices, so constructed and e nipped. that a number of them be employe protect the threads on the upstanding portions thereof during the process of pouring To the attainment'of the foreggin the in-' on outlet devices to vention consists in the outlet device and inthe levelling appurtenance as hereinafter described and particularly pointed out my appended'claims.

hereby made a part hereof:

Figure 1 is a side elevation of what I denominate the T-type of outlet device .constructed according to my invention.

- Figure 2 is a top plan viewof the same.

Figure 3 is a longitudinal central vertical section.'

In the accompanying drawings, which are Figure 4 is a transverse section, taken'in the plane indicated by urel.

Figure 5 is a side elevation of the l.-type of outlet device embodying my invention.

Figure 6 is a top plan of the same.

the line of Fig- F igure 7 is a vertical's'ection showing the closure member on the of an outlet device.

Figure 8 is a side elevation of the same. Figure 9 is a plan of said closure device. -Fig'u're 10 is a view showing in elevation upstanding portion the levelling appurte'nance on the upstanding portion of an outlet device.

igure 11 is a top plan view of the, same. Figures 12 and 13 are sections of a modified levelling device; Figure 13 being taken in the plane indicated by line 1313 of Figure 12. I

Figure 14 is a side elevation of a T-shaped outlet device embedded in concrete and having a levelling appurtenance attached thereto.

Referring by numeral to said drawings and more thereof:

1 is the bod of the T-form of outlet 'device. The said body is hollow and in the particularly to Figures 1 and 4 present and preferred instance is flat at its underside, as indicated by 2, and is provided with reduced and interiorly threaded end portions 3 and with a tapered top/i which contributes to the even 'fiow of the concrete and merges into a central upstanding tubular and exteriorly threaded portion '5.

not"

I: 1 of the device is of L form, and is pref- Fixed in transverse position to the flat underside 2 of the body 1 is an attachin fixture 6. This fixture 6 is preferably, thoug not necessarily, formed of a strap of metal, is carried slight distances laterally beyond the sides of the body 1, and then downwardly, as indicated by 7, and terminates in apertured terminals 8 which are disposed in a horizontal plane slightly below and spaced from that of the underside of the body 1. The attaching fixture, as its name imparts, is for use in the connection of the outlet device to form before the concrete is poured; the apertures in the terminals of the said fixture serving for the assage of nails and screws to fix the attaching fixture and the outlet device in rigid relation upon the form, and the space between the major intermediate portion of the fixture and the form, afforded by the dropped end portions of the fixture permitting concrete to enter and fully occupy the space between the underside of the body 1 and the form and thereby contribute materially to the rigid positioning of the outlet device on the form and so that said device is effectually maintained against lateral or vertical movement with respect to the form.

In Figures 5 and 6 I show the L-type of outlet device. In this embodiment the body erably formed of a short elbow section of pipe with an interior thread at one end and an exterior thread at its opposite upstanding end. Mounted on the horizontal arm of the body 1 is a shackle 1", equipped with nuts 1 and adapted to eifect strong connection of the body 1 to an attaching fixture. 6 This latter is preferably, though not necessarily, formed of a strap of metal and comprises a horizontally disposed intermediate portion 13, arms 14 reaching at right angles therefrom, and terminals 15 reaching laterally outward from the ends of the arms and apertured for the passage of nails or screws through the medium of which the attaching fixture and the outlet device are rigidly connected to a form or other support.

Figures 7, 8 and 9 show the type of closure I prefer to employ for the upstanding portions of the outlet devices. The said closure is made up of an interiorly threaded body 17 adapted to be screwed upon the upstanding portion of an outlet device and having exterior longitudinal ribs 18 to enable the concrete vto positively hold the same against turning on the outlet device, and a plug .19 turned into the upper end of the body 17 and adapted to rest flush with said end and having a kerf20 in its upper end to facilitate its removal when the same is necessary. Manifestly the upper end of the body 17 and the plug 19 are adapted to rest flush with the upper surface of the floor structure when the same is completed, and without detracting from the finished appearance of the floor structure the plug 19 affords read means by which access may be gained to t e interior of the outlet device.

My novel levelling appurtenance 30 is illustrated in Figures 10 and 11 and by reference to said figures it will be understood as comprising a tubular stem 31 interiorly or exteriorly threaded for connection to the u standing portion of an outlet device, a p atform 32 integral with or fixed on'the upper end of said stem, and a spirit-level tube 33 arranged diametrically of and fixedly connected to said platform through the medium of shackles 34 or other suitable means. The said levelling appurtenance manifestly, is adapted to be used to advantage in the expeditious trueing up of the outlet devices in the first instance as well as for use by an inspector whose duty is to pass upon the correctness of the manner in which the outlet devices are set, with respect to being level, just before the pouring of the concrete. This will be appreciated as a material matter when it is stated that experience has demonstrated that the final inspection alluded to is desirable because there is great liability of disturbance or change of position of the outlet devices however securely they may be originally fastened in position.

In the modified levelling appurtenance, Figures 12 and 13, the tubular stem 40 is provided at 41 with diametrically opposite apertures in which is frictionally held a metallic holder 42 enclosing in part a spirit tube 43. This obviously is a construction well adapted to withstand the rough usage to which building appliances are ordinarill :I subjected.

aving described my invention, what I claim and desire to secure by Letters Patent, is:

1. An approximately T-shaped hollow body having horizontal tubular arms and a vertical tubular arm, an attaching element secured to the bottom of the hollow body for securing the same in place, in combination with a tube for detachable connection with the vertical tubular arm, and a level, element connected with the upper end of the tube and extending transversely thereof.

2. In combination, a casing provided with an inlet nipple and an outlet nipple, one of said nipples being cylindrical in shape and provided with screw threads, a metal strap connected to said casing and having oppositely arranged apertured feet, the outer surfaces of said feet being arranged in a plane extending parallel to the axis of said cylindrical nipple and said strap being bent to space said casing from a form to which the strap is to be attached, whereby cement pleced in the form may entirely snrround In testimony whereoi I aflix my signasaid casingab k d d d ture in presence of two witnesses.

3. A'eom ination of the in efine by l claim 2 in which a sleeve is arranged on EGBERT 5 one of said nipples and is provided with Witnesses:

ribs adapted to be embedded in the cement GEORGE E. HEIsLEY,

in which the casing is to be placed. W. R. BAUM. 

